盘算
pán suàn · HSK 7
to calculate
🧮 盘 plate/tray + 算 calculate = turning numbers over on a tray, scheming a plan
盘 — 舟 boat (phonetic) + 皿 dish (meaning)
Originally written 槃 with 木 wood, depicting a wooden tray or basin. The modern form 盘 keeps 皿 (dish/vessel) as the meaning component and uses 舟 as a phonetic hint. From 'flat tray' it extended to 'plate,' 'coil/wind around,' and 'examine.'
算 — bamboo 竹 + abacus 具 (eye 目 + two hands 廾)
Originally depicted counting with bamboo rods on an abacus-like device. The top 竹 (bamboo) refers to the bamboo counting sticks used in ancient Chinese arithmetic, while the bottom shows hands manipulating them. The meaning broadened from 'to count' to 'to calculate' or 'to plan'.